Buggy code:
public class WaterBudget extends JGTModel { @ Description ( "precipitation:<seq2seq4repair_space>precipitation<seq2seq4repair_space>value<seq2seq4repair_space>for<seq2seq4repair_space>the<seq2seq4repair_space>given<seq2seq4repair_space>time<seq2seq4repair_space>considered" ) double precipitation ; @ Description ( "Input<seq2seq4repair_space>Precipitation<seq2seq4repair_space>Hashmap" ) @ In public HashMap < Integer , double [ ] > inPrecipvalues ; @ Description ( "ET:<seq2seq4repair_space>ET<seq2seq4repair_space>value<seq2seq4repair_space>for<seq2seq4repair_space>the<seq2seq4repair_space>given<seq2seq4repair_space>time<seq2seq4repair_space>considered" ) double ET ; @ Description ( "Input<seq2seq4repair_space>ET<seq2seq4repair_space>Hashmap" ) @ In public HashMap < Integer , double [ ] > inETvalues ; @ Description ( "Input<seq2seq4repair_space>Discharge<seq2seq4repair_space>Hashmap:<seq2seq4repair_space>this<seq2seq4repair_space>is<seq2seq4repair_space>the<seq2seq4repair_space>measured<seq2seq4repair_space>" + ( "discharge<seq2seq4repair_space>time<seq2seq4repair_space>series,<seq2seq4repair_space>in<seq2seq4repair_space>the<seq2seq4repair_space>case<seq2seq4repair_space>of<seq2seq4repair_space>resultion<seq2seq4repair_space>of<seq2seq4repair_space>the<seq2seq4repair_space>" + "water<seq2seq4repair_space>budget<seq2seq4repair_space>with<seq2seq4repair_space>given<seq2seq4repair_space>the<seq2seq4repair_space>external<seq2seq4repair_space>values" ) ) @ In public HashMap < Integer , double [ ] > inDischargevalues ; @ Description ( "time<seq2seq4repair_space>step<seq2seq4repair_space>of<seq2seq4repair_space>the<seq2seq4repair_space>simulation" ) @ In public int inTimestep ; @ Description ( "Integration<seq2seq4repair_space>time" ) double dt ; @ Description ( "Area<seq2seq4repair_space>of<seq2seq4repair_space>the<seq2seq4repair_space>basin" ) @ In public static double A ; @ Description ( "Parameter<seq2seq4repair_space>of<seq2seq4repair_space>the<seq2seq4repair_space>non-linear<seq2seq4repair_space>Reservoir<seq2seq4repair_space>model<seq2seq4repair_space>" + "for<seq2seq4repair_space>the<seq2seq4repair_space>considered<seq2seq4repair_space>layer" ) @ In public static double a ; @ Description ( "Parameter<seq2seq4repair_space>of<seq2seq4repair_space>non-linear<seq2seq4repair_space>reservoir,<seq2seq4repair_space>for<seq2seq4repair_space>the<seq2seq4repair_space>upper<seq2seq4repair_space>layer" ) @ In public static double b ; @ Description ( "Pore<seq2seq4repair_space>volume<seq2seq4repair_space>in<seq2seq4repair_space>the<seq2seq4repair_space>root<seq2seq4repair_space>zone" ) @ In public static double nZ ; @ Description ( "Maximum<seq2seq4repair_space>value<seq2seq4repair_space>of<seq2seq4repair_space>the<seq2seq4repair_space>water<seq2seq4repair_space>storage,<seq2seq4repair_space>needed<seq2seq4repair_space>for<seq2seq4repair_space>the" + "computation<seq2seq4repair_space>of<seq2seq4repair_space>the<seq2seq4repair_space>Actual<seq2seq4repair_space>EvapoTraspiration" ) @ In public static double s_max ; @ Description ( "Maximum<seq2seq4repair_space>recharge<seq2seq4repair_space>rate<seq2seq4repair_space>of<seq2seq4repair_space>the<seq2seq4repair_space>lower<seq2seq4repair_space>layer" ) @ In public static double Re ; @ Description ( "Discharge<seq2seq4repair_space>model:<seq2seq4repair_space>NonLinearReservoir,<seq2seq4repair_space>ExternalValues" ) @ In public String Q_model ; @ Description ( "ET<seq2seq4repair_space>model:<seq2seq4repair_space>AET,ExternalValues" ) @ In public String ET_model ; @ Description ( "ODE<seq2seq4repair_space>solver<seq2seq4repair_space>" ) @ In public String solver_model ; @ Description ( "Simluted<seq2seq4repair_space>value<seq2seq4repair_space>of<seq2seq4repair_space>AET" + "at<seq2seq4repair_space>a<seq2seq4repair_space>given<seq2seq4repair_space>time<seq2seq4repair_space>step" ) double AET ; DischargeModel model ; ETModel ETmodel ; @ Description ( "The<seq2seq4repair_space>output<seq2seq4repair_space>HashMap<seq2seq4repair_space>with<seq2seq4repair_space>the<seq2seq4repair_space>Water<seq2seq4repair_space>Storage<seq2seq4repair_space>" ) @ Out public HashMap < Integer , double [ ] > outHMStorage = new HashMap < Integer , double [ ] > ( ) ; @ Description ( "The<seq2seq4repair_space>output<seq2seq4repair_space>HashMap<seq2seq4repair_space>with<seq2seq4repair_space>the<seq2seq4repair_space>discharge<seq2seq4repair_space>" ) @ Out public HashMap < Integer , double [ ] > outHMDischarge = new HashMap < Integer , double [ ] > ( ) ; @ Description ( "The<seq2seq4repair_space>output<seq2seq4repair_space>HashMap<seq2seq4repair_space>with<seq2seq4repair_space>the<seq2seq4repair_space>AET<seq2seq4repair_space>" ) @ Out public HashMap < Integer , double [ ] > outHMEvapotranspiration = new HashMap < Integer , double [ ] > ( ) ; @ Description ( "The<seq2seq4repair_space>output<seq2seq4repair_space>HashMap<seq2seq4repair_space>with<seq2seq4repair_space>the<seq2seq4repair_space>quick<seq2seq4repair_space>runoff" ) @ Out public HashMap < Integer , double [ ] > outHMQuick = new HashMap < Integer , double [ ] > ( ) ; @ Description ( "The<seq2seq4repair_space>output<seq2seq4repair_space>HashMap<seq2seq4repair_space>with<seq2seq4repair_space>the<seq2seq4repair_space>outflow<seq2seq4repair_space>" + "which<seq2seq4repair_space>drains<seq2seq4repair_space>to<seq2seq4repair_space>the<seq2seq4repair_space>lower<seq2seq4repair_space>layer" ) @ Out public HashMap < Integer , double [ ] > outHMR = new HashMap < Integer , double [ ] > ( ) ; HashMap < Integer , double [ ] > initialConditionS_i = new HashMap < Integer , double [ ] > ( ) ; int step ; @ Execute public void process ( ) throws Exception { checkNull ( inPrecipvalues ) ; Set < Map . Entry < Integer , double [ ] > > entrySet = inPrecipvalues . entrySet ( ) ; if ( ( step ) == 0 ) { for ( Map . Entry < Integer , double [ ] > entry : entrySet ) { Integer ID = entry . getKey ( ) ; initialConditionS_i . put ( ID , new double [ ] { 0.0 } ) ; } } for ( Map . Entry < Integer , double [ ] > entry : entrySet ) { Integer ID = entry . getKey ( ) ; precipitation = inPrecipvalues . get ( ID ) [ 0 ] ; if ( isNovalue ( precipitation ) ) precipitation = 0 ; double Qinput = 0 ; if ( ( inDischargevalues ) != null ) Qinput = inDischargevalues . get ( ID ) [ 0 ] ; ET = 0 ; if ( ( inETvalues ) != null ) ET = inETvalues . get ( ID ) [ 0 ] ; double waterStorage = computeS ( Qinput , initialConditionS_i . get ( ID ) [ 0 ] ) ; <START_BUG> double discharge = computeQ ( Qinput , initialConditionS_i . get ( ID ) [ 0 ] ) ; <END_BUG> double evapotranspiration = computeAET ( initialConditionS_i . get ( ID ) [ 0 ] ) ; double drainage = computeR ( discharge ) ; double quickRunoff = computeQuick ( discharge , drainage ) ; storeResult_series ( ID , waterStorage , discharge , evapotranspiration , quickRunoff , drainage ) ; initialConditionS_i . put ( ID , new double [ ] { waterStorage // ( WaterBudget . nZ ) } ) ; } ( step ) ++ ; } public double computeS ( double Qinput , double S_i ) throws IOException { } public double computeQ ( double Qinput , double S_i ) throws IOException { } public double computeR ( double Q ) throws IOException { } public double computeQuick ( double Q , double R ) throws IOException { } public double computeAET ( double S_i ) throws IOException { } private void storeResult_series ( int ID , double waterStorage , double discharge , double evapotranspiration , double quickRunoff , double drainage ) throws SchemaException { } No newline ; at end ; of file ; }

Fix:
double discharge = computeQ ( Qinput , waterStorage ) ;